1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bc6fb4f67eec17b7b72b30bce0393cbfad7e24221c4427d8dd2bb0e5cbba97. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eed05484-1db9-4098-a9dc-7b7a8df92a31.json and https://artists.proofprofile.net/proofs/artist/eed05484-1db9-4098-a9dc-7b7a8df92a31.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edecedd3f3028f0560368ed85193a13bc206d3dc75b7d0fb37674214480100b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA830500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf499ee0971ee325aaca7ce01bb2d7c03fffef5fb7dd61f65d12d1edc442dea2c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA830500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e94bcd4b9e08c0880b248ab4431f1e65631c1fcbff558d2005d90efce8a1db3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA830500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e9f0868e063b55d7fc7f4385abdc6bcf4dcb060ff5cf88f43358d4a46f5c6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA830500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f3903e8d2760a3c8f00381166e7f6073c91c4667b73785275c8e46e528476. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA830800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d98ad6bb5def301fe85c42d16bacfd182ebb402a0236e34d3390ce9cf01e8eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA830800096.